Add a content placeholder element to the address transactions lists

apps/explorer_web/assets/css/components/_tile.scss

@@ -68,3 +68,10 @@
   line-height: 1.25rem;
   text-align: center;
 }
+
+.tile-muted {
+  border-left: 1px solid $border-color;
+  background-color: $gray-100;
+  color: $text-muted;
+  box-shadow: none;
+}

apps/explorer_web/lib/explorer_web/templates/address_internal_transaction/index.html.eex

@@ -82,7 +82,9 @@
             <%= render "_transaction.html", locale: @locale, internal_transaction: internal_transaction %>
           <% end %>
         <% else %>
-          <p><%= gettext "There are no Internal Transactions" %></p>
+          <div class="tile tile-muted text-center">
+            <span><%= gettext "There are no Internal Transactions" %></span>
+          </div>
         <% end %>
       </div>
     </div>

apps/explorer_web/lib/explorer_web/templates/address_transaction/index.html.eex

@@ -129,7 +129,9 @@
             <%= render "_transaction.html", locale: @locale, transaction: transaction %>
           <% end %>
         <% else %>
-          <p data-selector="empty-transactions-list"><%= gettext "There are no Transactions" %></p>
+          <div class="tile tile-muted text-center">
+            <span data-selector="empty-transactions-list"><%= gettext "There are no Internal Transactions" %></span>
+          </div>
         <% end %>
       </div>
     </div>